feat(config): defined a dependency on the provided prettier config

Author: travi

src/scaffolder-test.js

@@ -5,9 +5,11 @@ import scaffold from './scaffolder';
 
 suite('scaffolder', () => {
   test('that prettier is scaffolded if config is provided', async () => {
-    const {devDependencies} = await scaffold({config: {scope: `@${any.word()}`}});
+    const scope = `@${any.word()}`;
 
-    assert.deepEqual(devDependencies, ['prettier']);
+    const {devDependencies} = await scaffold({config: {scope}});
+
+    assert.deepEqual(devDependencies, ['prettier', `${scope}/prettier-config`]);
   });
 
   test('that prettier is not scaffolded if no config is provided', async () => {

src/scaffolder.js

@@ -1,5 +1,5 @@
 export default function ({config}) {
   if (!config) return {};
 
-  return {devDependencies: ['prettier']};
+  return {devDependencies: ['prettier', `${config.scope}/prettier-config`]};
 }

test/integration/features/step_definitions/dependencies-steps.mjs

@@ -5,4 +5,5 @@ Then('the dependencies are defined', async function () {
   const {devDependencies} = this.scaffoldResult;
 
   assert.include(devDependencies, 'prettier');
+  assert.include(devDependencies, `${this.scope}/prettier-config`);
 });